Clinching press



Nov. 12, 1923. c. P. WILSON 3 9 CLINCHING PRESS Filed May 31, 1929 Quorum Patented Nov. 12, 1929 UNITE cLINcn ING i nnss Application filed May 31, isaef serieinol 361496; f i

This invention relates to foot-pressesused for forming and cllnching w1re products,

and the like, the object of the invention being to produce a press adapted to clinch the tangs ,5 of a staple around a welt at the edge of tent curtains to form projecting eyes for lacing and stretching, instead of the grommets commonly'einployed for thatpurpose. V

The'invention is fully disclosed in the description and claims following, reference being had to the accompanying drawing, in which Fig. 1 is a side elevation of apress embodying the invention. Fig. 2 is a front elevation of the upper part of the press. Fig. 3 is a vertical section of the same, on the line 3-3 of Fig. 2. IFig. 4L isa fragmentary View ope posite that of Fig. 1, showing details of the upper portion of the press. Fig. 5 isaview in perspective of a staple to be clinched by the press Fig. 6 shows in perspective the staple clinched about a marginal welt.

In the drawing, the numeral 5 denotes the press-head, which is mountedon a suitable column 6, of tubular material, and that on a base 7 carrying a foot-lever 8. The foot-lever connects by a rod 9 with 'a plunger lever 10 pivoted at '11. A plunger 12 is mounted slidably in a guideway formed in the press-head,

and connects with the lever, 10 by links 13..

A' spring not shown serves to carry the footlever end connectedparts to the elevated position, according to familiar press construction.

At the lower end of the plunger is formed a semi-cylindrical groove 14, which, when the plunger is depressed, matches a corresponding groove 15 in a die 16 set on aforwardly extending shoulder. of the press-head.

The die also is provided with a gauge-plate 17 toserve as a back-stop forthe loop of the staple when set for clinching. Forward of this back-stop is a pair of upstanding pins 18 to serve as a similar stop for the fabric and welt, as shown in Fig. 4:.

resser-plate 19 by its slotted'side flanges 2O engaging studs 21 set in the press-head. The

resser-plate connects with the plunger lever In front of the plunger is mounted a at one end with a emcee the pre er plate,'and' at the other 'e'ndby" another stud 25jto the head." The tension of thespring tendsto hold the presse'r-plate to n rmalpo: sltion' againstthe front "ofthe press-head; The side s ots permit it t'o' slide vertically' a' limited'distance when forced downwar'dlyby i the plunger lever, and concurrently withthe latter. The lower end "of the pressei -pla'tef is formed as aratherbroad finger 26, extend ing inwardly, and slotted at 27 to admit the tangs of-the staple 28. In the preliminary act of attachingthe staple to 'the fabric the.

presser-plate forcesthe fabric-down over the staple tangs preparatory to the final'c'linch 'ingof the tangs; Durin'g'this part'of the operation the presser-platej'is controlled grooved guide" 29- attached to the presshead, the groove in the guide'being engaged by a rib "formed on' the Presser-plate;

,VVhen, however, the presser-plate has reached wthe li'mit 'of its downward movement, as-lim'- ited' by the slots and studs '21, it' is disengaged' from its" guide, andis'then'forced to swing outwardly by the further movement of the plunger andits lever. i This frecs thef presser p'late from the tangs of the staple,

and allows the plunger, which has followed its downward'niovement; to clinch theta-rigs. These, under the final pressure of theplun er',

t'ake'the form shown'in Fig. 6g tightly en circling the welt 31; forme'd by enclosing a: cord 32in a fold of the fabric{ 33.f]-

The extending-loop of the"'sta ple makes a very, convenient eve for the attachment ofa tent-rope, orthe like, and a heavy strain on the rope does not tend to tear the fabric as does a like strain on a grommet. It is to benoted further that the operation is simple andrapid, no preliminary punching of the fabric being required,'as in the application of eyelets or grommets.

Having thus described my invention, 1' claim: I p r 1. A press of the designated character having adie to support the loop of a staple having upturned tangs, a cooperating plunger to form the tangs as eyes about a welted fabric,

means for forcing the plunger to clinching position, a pilot presser-plate adapted to force the fabric down over said tangs, and means whereby the presser-plate is shifted from under the plunger to permit the final clinching of the tangs around the welt. V V

2 A- press ,of the designated character, hav- 'ing a die tosupport the loop of a staple having angled and upturned tan'gs, a cooperating plunger to form the tangs asieyesaround a welted fabric, means for forcing the plunger to clinching position, a pilot resser-plate having a slotted finger'to receive the upturned" tangs and forcefthe fabric thereover,,a guide.

i I 'forthepresser-plate during the puncturing of the fabric, and means adapted to shiftvthe' finger of the presser-plate out of the path: of the following. plunger.

3::-In# a press of the designated JsaidtangS- around the welt, atiltable and slidab'le .presserplate having a slotted finger preceding the plunger'andadapted to force the fabric over th e'tangs-', a guide for the vPresserplate duringiits said operation, means cooperating] with both the plunger and presser'-plate to actuate them in their working movements, and to tilt the presser-plate outwardly from under the plunger, and'a recoil: spring, adapted to restore the plate guide-engaging position v 4. In a press of the designated character,

a die to support the body of astaple having u ptu1rn(-1dtangs,a plungercooperating with r the die to clinch the tangs about a welted v fabric, a lever to actuate the. plunger, a

presser-plat'e having a slotted finger to admit the tangs' and. disposed ahead of the plunger,

a guide for the presser plate whileforcing the Welted fabric over thetangs, a diagonally disposedlink connecting the" presser-plate with the plunger lever, and adapted to tilt it outwardly to clear the plunger when re-' leased from the guide, and a spring in operative connection with the presser-plate to restore'it: to normalposition. o

In testimonvwhereof I afiix mysignature. r

'- CLEMENT PIERCE WILSON;

. character, a. die adapted to guide and support the loop of a staple having angled and upturned tangs,

and having a' guide-stop for awelted fabric, a plunger cooperating with the die to clinch presser- 

